If you are experiencing a freeze/hang or general performance issues in the game, please try the following troubleshooting tips:
1) Ensure you have the latest version of the game installed.
- Tap on the Google Play app on your menu
- Tap the menu button (three dots) which is located at the top right-hand side of the screen
- Tap 'My Apps'
- Scroll to the game and tap update
This will start the update
2) Ensure you are running the latest firmware version. 
- Tap on the "Settings" menu
- Then push the tab further into the upper right corner of the screen
- At the bottom of the next window, click the "About Device" button
- Here you will find the "Software Update" tab
- Download and install the update
3) Completely close the game and restart your device to increase memory.
- Completely close your game and any other Apps open on your device
- Turn off your device and wait 10 seconds before turning it back on
- Open your game and ensure you have reconnected using your correct Facebook account (if applicable)
4) Check your device storage capacity and remove any unused Apps, pictures/videos and files.
- Open the device "Settings" menu
- Scroll to "Storage" and tap on this
- This will take you device memory
If you are still experiencing performance issues after following the above steps, please submit a support ticket with as much information as possible regarding the issue.